I got the schematic and Wiring/Parts Placement Diagram enlarged to 24 x 36. Just right!
I then started to work on the chassis. It is bit grimy and it has a layer of white corrosion all over. I think the plating did its job! To clean the chassis right, I decided to pull what I could off the chassis.
I pulled the yoke, the big resistor in the HV cage, HV cage, flyback, and HV rectifier tube and mount, and the resistor cage.
The big resistor had opened some tome ago and was replaced by 2 10K 20W resistors.
Here is a picture of the bottom of the socket from the 1b3GT HV rectifier tube.
While removing the resistor heatsink cage I found a wire that had barely been soldered on to one the resistor's terminals!
I'll have more pics later. Lots came off the chassis.